You shouldn't try to fit all the warm-loving vegetable crops into one greenhouse. This isn't the best idea, if only because, when growing side by side, they can start competing for nutrients or prevent each other from growing.
Here is just one example of unsuccessful farming.
Before planting tomatoes and cucumbers in the same greenhouse, you need to find out what conditions both crops prefer. And they are different.
What do cucumbers need?
Such familiar cucumbers turn out to be quite demanding to the conditions of growth. They like warmth - air temperature within 25-30 degrees Celsius. However, above this mark they die.
Cucumbers love moisture, moist and fertile soil, and high air humidity.
What do tomatoes need?
But tomatoes, which love warmth no less than cucumbers, do not tolerate high humidity at all. As for watering, it should be rare, but abundant. It also requires much more fertilizing than cucumbers.
Tomatoes and cucumbers in a greenhouse
As it has already become clear, it is simply impossible or almost impossible to create equally comfortable conditions for two vegetable crops in one greenhouse. Tomatoes will have to be regularly ventilated, and cucumbers will clearly not like this. Therefore, it will be difficult to collect a good harvest of vegetables in such conditions.
Only proper placement of vegetables in the greenhouse can help. For example, tomatoes should be planted right at the entrance, and cucumbers should be moved deeper into the greenhouse.
There, cucumbers will not be disturbed by fresh air, which is necessary for tomatoes. But even in this case, it will not hurt to partition the inner space of the greenhouse by hanging a film to create the most comfortable conditions for cucumbers.